Tibetan singing bowls promote healing through sound and vibration. The sound that the bowl produces helps to provide a sense of calmness so that one can channel their thoughts and meditate. They are a great tool when learning how to practice the pause and sit with yourself.
Mental or emotional effects include a relaxed mind, mental/emotional tensions and blockages are eased and better concentration for guidance into a deep meditative state.
Spiritual effects include having a positive sense of self and cleansing your aura/chakras.